- Servers may be flagged up/down and the user may specify a error callback
- Individual server params and up/down status may be changed at runtime
- New methods: setServerParams(), getServerStatus()
- Statistics methods support fetching other kinds of stats (slabs, items, cachedump, ...)
- Fixed PECL bugs #7631, #8117 (erroneous line feeds in config.m4)
- Added memcache.max_failover_attempts ini directive, which can be used to configure max number of
servers to try when setting and getting data.

1) Fixed typo, preventing to use set() with flags and expire in the same time (thanks to Troy Hakala [troy at recipezaar dot com] for noticing).
2) Added possibility to store objects and arrays compressed.
3) Hopefully fixed all possible problems with persistent connections (thanks to [anight at monamour dot ru]).
4) Some uncritical impovements.